EVAL5973AD: 3.3V @ 2A, 4.4 ~ 36Vin (25V Board)
Summary
The L5973AD is a step down monolithic power switching regulator capable to deliver up to 2A at output voltages from 1.235V to 35V.
The operating input voltage ranges from 4.4V to 36V (the eval board is limited to 25V due to the input capacitor). It is realized in BCDV technology and the power switching element is realized by a P-Channel D-MOS transistor. It doesn’t require a bootstrap capacitor, and the duty cycle can range up to 100%.
An internal oscillator fixes the switching frequency at 500KHz. This minimizes the LC output filter. Synchronization pin is available in the case higher frequency is requested.
Pulse by pulse and frequency foldback overcurrent protections offer an effective short circuit protection.
Other features are voltage feed forward, protection against feedback disconnection, inhibit and thermal shutdown.
Specifications
| Manufacturer | STMicroelectronics |
|---|---|
| Category | AC/DC and DC/DC Conversion |
| Sub-Category | DC/DC SMPS - Single Output |
| Eval Board Part Number | 497-4133-ND |
| Eval Board Supplier | STMicroelectronics |
| Eval Board |
Board not Stocked
|
| Topology |
Step Down
|
| Outputs and Type |
1 Non-Isolated
|
| Voltage Out: Factory Set |
3.3 V
|
| Current Out |
2 A
|
| Voltage In |
4.4 ~ 36 V
|
| Efficiency @ Conditions |
>85%, 5V in, 3.3V @ 0.2 ~ 1.2 A
>82%, 12V in, 5V @ 200 mA ~ 2 A >78%, 5V in, 3.3V @ 200 mA ~ 2 A >76%, 12V in, 3.3V @ 200 mA ~ 2 A >75%, 5V in, 2.5V @ 200 mA ~ 2 A >71%, 12V in, 2.5V @ 200 mA ~ 2 A >70%, 5V in, 1.8V @ 200 mA ~ 2 A |
| Voltage Out Range |
1.25 ~ Vin
|
| Features |
Over Current Protection
Short Circuit Protection Shutdown, Enable, Standby Synchronizable Thermal Protection |
| Switching Frequency |
500 kHz
|
| Standby Current [Typical] |
50 µA
|
| Quiescent Current [Typical] |
5 mA
|
| Component Count + Extras |
9 + 3
|
| Internal Switch |
Yes
|
| Design Author |
STMicroelectronics
|
| Application / Target Market |
Computers
DVD/Blu-ray Players Point of Load (PoL) Set-Top Boxes Telecom |
| Standby Current [Maximum] |
100 µA
|
| Quiescent Current [Maximum] |
7 mA
|
| Main I.C. Base Part |
L5973AD
|
| Date Created By Author | |
| Date Added To Library | 2011-03 |
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